Patch 3.3.3 (2010-03-23): The ability now innately applies Frost Fever to a target.

Patch 3.3.0 (08-Dec-2009): This ability will no longer appear to land on targets which are immune.

Patch 3.2.0 (04-Aug-2009): Now reduces movement by 95% instead of 100%. The main effect of this change will be that targets of Chains of Ice will not have to re-issue a movement command to continue moving.

Patch 3.0.8 (2009-01-20): This ability is no longer able to land on death knights who have Anti-Magic Shell active.